Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a first image of a first embodiment of a display screen or portion thereof with an animated graphical user interface showing our new design;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a third image thereof;

FIG. 4 is a front view of a fourth image thereof;

FIG. 5 is a front view of a first image of a second embodiment of a display screen or portion thereof with an animated graphical user interface showing our new design;

FIG. 6 is a front view of a second image thereof;

FIG. 7 is a front view of a third image thereof; and,

FIG. 8 is a front view of a fourth image thereof.

In the first embodiment, the appearance of the transitional image sequentially transitions between the images shown in FIGS. 1 through 4. In the second embodiment, the appearance of the transitional image sequentially transitions between the images shown in FIGS. 5 through 8. The process or period in which one image transitions to another image forms no part of the claimed design.

The dash-dot broken line showing of a portion of a display screen in FIGS. 1-8 represents environmental subject matter and forms no part of the claimed design. The dashed broken line showing of portions of the graphical user interface in FIGS. 1-8 represents environmental subject matter and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with an animated graphical user interface, as shown and described. 